bee killer

Century Dictionary and Cyclopedia

1. n. A kind of robber-fly, Trupanea apivora, a dipterous insect of the family Asilidœ, which attacks honey-bees on the wing and kills them.

GNU Webster's 1913

1. n. (Zoöl.) a large two-winged fly of the family Asilidæ (esp. Trupanea apivora) which feeds upon the honeybee. See Robber fly.

WordNet 3.0

1. n. swift predatory fly having a strong body like a bee with the proboscis hardened for sucking juices of other insects captured on the wing